**The Trick**

After discussing **multiplication of numbers by 11**, let us discuss another math shortcut method which is very popular among kids and teenagers. This is squaring numbers ending in 5.

For kids, you can read the first portion of this post if you want to learn the trick, and read further if you want to learn the mathematics behind the trick.

Remember: it is cool if you know the trick, but it is even cooler if you know why it works. Mathematics is not just knowing the method, but also knowing the reasons.

Math Shortcut on Squaring Numbers Ending in 5

The algorithm is squaring numbers ending in 5 is the following.

1.) Multiply the ones digits. That is 5 x 5 since they both of them in 5. Write 25 as product as shown below. The last two digits of this trick is always 25. Continue reading